I need help with this please someone very smart at math this algebra 2

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?